Rockwell Automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE - Manual (Page 44)

SMC Dialog Plus Smart Motor Controller 3-7
Phase Rebalance
As little as 4% supply voltage unbalance can result in a 20% current
unbalance and a 25% increase in motor temperature, possibly
triggering a premature failure of the motor. The SMC Dialog Plus
controller continuously monitors the incoming three-phase line
voltage balance and adjusts the output voltage automatically to
balance the three-phase currents drawn by the motor.
Figure 3.9 Phase Rebalance
Notes: (1) Phase Rebalance is not active during bypass operation.
(2) Phase rebalance requires the use of the converter modul
(Bulletin 825) and fanning strip (Cat. No. 150-NFS).
Metering
The SMC Dialog Plus controller contains several power monitoring
parameters as standard. These parameters include:
• Three-phase Current • Three-phase Voltage
• Power in kW • Power Usage in kWH
• Power Factor • Elapsed Time
• Motor Thermal Capacity Usage
Fault Indication
The SMC Dialog Plus controller monitors both the pre-start and
running modes. If the controller senses a fault, the SMC Dialog Plus
controller shuts down the motor and displays the appropriate fault
condition in the LCD display. The controller monitors the following
conditions:
• Open Gate • Line Fault
• Undervoltage • Underload
• Overvoltage • Excessive Starts/Hour
• Voltage Unbalance • Overtemperature
• Phase Reversal • Stall
• Power Loss • Jam
• Overload • System
Any fault condition will cause the auxiliary contacts to change state
and the hold-in circuit to release.
SMC Dialog Plus
Supply
Voltage
501V
480V
462V
Motor